EP3609667B1 - Semi-finished product and method for manufacturing a semi-finished product having at least one microcomponent - Google Patents

Semi-finished product and method for manufacturing a semi-finished product having at least one microcomponent Download PDF

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Publication number
EP3609667B1
EP3609667B1 EP18718131.8A EP18718131A EP3609667B1 EP 3609667 B1 EP3609667 B1 EP 3609667B1 EP 18718131 A EP18718131 A EP 18718131A EP 3609667 B1 EP3609667 B1 EP 3609667B1
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EP
European Patent Office
Prior art keywords
semi
lost part
finished product
component
micro
Prior art date
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EP18718131.8A
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German (de)
French (fr)
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EP3609667A1 (en
Inventor
Dominik Kreuzmayr
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Beta Beratungs- und Beteiligungs-Gmbh
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Beta Beratungs- und Beteiligungs-Gmbh
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B81—MICROSTRUCTURAL TECHNOLOGY
    • B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
    • B81C3/00—Assembling of devices or systems from individually processed components
    • B81C3/008—Aspects related to assembling from individually processed components, not covered by groups B81C3/001 - B81C3/002
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B81—MICROSTRUCTURAL TECHNOLOGY
    • B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
    • B81C99/00—Subject matter not provided for in other groups of this subclass
    • B81C99/0075—Manufacture of substrate-free structures
    • B81C99/0085—Manufacture of substrate-free structures using moulds and master templates, e.g. for hot-embossing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B29C2045/0058—Shaping removing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C2045/0094—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor injection moulding of small-sized articles, e.g. microarticles, ultra thin articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0027—Cutting off
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
    • B29K2083/005—LSR, i.e. liquid silicone rubbers, or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/756—Microarticles, nanoarticles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs

Definitions

  • the invention relates to a semi-finished product and a method for producing a semi-finished product having at least one microcomponent using a multi-component injection molding process in which at least one mold cavity of an injection mold is provided with at least one lost part made of a first material, in particular an injection-molded plastic material, and in In a further step for producing the microcomponent, a second material, which is different from the first material and is based on an elastomer, in particular silicone, is injected, as a result of which a firm and form-fitting connection is formed between the microcomponent and the lost part.
  • a second material which is different from the first material and is based on an elastomer, in particular silicone
  • micro-injection molding which is used to produce extremely small components weighing less than a milligram ( DE19850046A1 ), to realize hollow structures using a loose core or lost core or lost part.
  • the lost part is overmoulded using a two-component injection molding process, which creates an inseparable, firm and form-fitting connection between them.
  • the lost part is then dissolved in order to remove it from the semi-finished product and thus get to the micro-component.
  • a wide variety of materials for the microcomponent and for the lost part are known in the prior art.
  • the invention has therefore set itself the task of changing a method for producing a semi-finished product with at least one micro-component in such a way that short cycle times can be achieved without risk despite the smallest dimensions on the injection-moulded semi-finished product.
  • the invention solves the problem by providing a method with the features of main claim 1.
  • the lost part provided for the mold cavity of the injection mold is designed as a macroscopic slide for the microcomponent for handling the semi-finished product and the mold cavity is provided with this lost part.
  • the lost part intended for the mold cavity of the injection mold is designed as a macroscopic object carrier for the microcomponent and the mold cavity is provided with this lost part, the handling of the microcomponent can be made easier in the first place, because a possible manipulator does not work on the microcomponent but on the larger and larger part /or can attack heavier slides. A time-consuming fine positioning of the manipulator can thus be avoided, which can significantly reduce the cycle time of the method according to the invention. In addition, the risk of incorrect handling of the semi-finished product by the manipulator can be reduced, which can further increase the reproducibility of the method according to the invention.
  • this handling of the semi-finished product via the lost part can keep disadvantageous handling effects away from the microcomponent, especially since it is in the nature of the lost part to be completely separated from the microcomponent. Scratches or other material damage to the lost part can therefore not affect the reproducibility of the process, which can benefit the economics of the process.
  • the method according to the invention can therefore not only be carried out quickly, but also in a highly reproducible manner, which can be used to reduce costs.
  • the lost part can preferably be produced from a plastic material, in particular from a thermoplastic, by an injection molding process, in order to achieve the required macroscopic properties for the specimen slide.
  • the handling of the semi-finished product can be made easier if at least one handling surface is formed on the outside of the semi-finished product on the lost part, which surface is free from the micro-component. This can also increase the safe and quick gripping of the semi-finished product from the manipulator and thus further facilitate the process.
  • the reproducibility of the method can be further increased if, in order to form the connection between the microcomponent and the lost part in the multi-component injection molding method, through at least one opening on the lost part the second material is injected. This is because the microcomponent can be reliably held at its neck section via this opening in the lost part, which can ensure damage-free handling even of comparatively slender microcomponents.
  • the semi-finished product can be prepared for the removal of the lost part in that a predetermined breaking point is formed in the lost part. This formation preferably takes place before the injection of the second material on an elastomer basis into the mold space of the injection molding tool.
  • the dissection of the lost part and subsequently the release of the form-fitting connection can thus proceed in predetermined ways in order to avoid damage to the microcomponent.
  • this predetermined breaking point of the form-fitting connection is tapered, the risk of damage to the microcomponent can be further reduced when the lost part is removed.
  • the predetermined breaking point of the opening is tapered.
  • a reliable separation of the form-fitting connection between the opening of the lost part and the microcomponent can thus be ensured, with a predetermined breaking point running in this way also not impairing the handling of the semi-finished product. This can be improved if the predetermined breaking point ends before the opening.
  • Shorter cycle times in the process can further result if the lost part is made from a plastic material by an injection molding process.
  • a predetermined breaking point can also be produced on the lost part.
  • Further optimizations can result if the lost part is produced in a cavity of the injection mold for the multi-component injection molding process and introduced into the mold space for the multi-component injection molding process via an index plate, for example screwed in, will.
  • index plate for example screwed in
  • the fixed positive connection between the lost part and the microcomponent can be formed reproducibly if the lost part forms at least one undercut on the microcomponent in the multi-component injection molding process. This can be further improved if a hidden undercut is formed on the microcomponent.
  • Such an undercut can be created, for example, by a projection on the lost part.
  • this undercut does not represent an obstacle in the process, even if the lost part is separated from the micro-component.
  • the undercut is then accessible on the microcomponent and can facilitate handling.
  • This mounting recess created in this way can namely be matched to a possible mounting tool.
  • the method can also be used to connect the semi-finished product to a medicinal active substance. This can be done, for example, by spraying, roller coating or the like. This can also ensure that the microcomponent carries this active ingredient, even if the lost part is removed from the microcomponent. It is also conceivable to add this active ingredient, for example with an antibacterial effect, etc., to the elastomer base of the microcomponent.
  • the method described above can be particularly distinguished in that it is used in the production of a microcomponent.
  • the lost part is removed from the semi-finished product in order to release the micro-component from the semi-finished product.
  • separating the lost part from the semi-finished product can enable the lost part to be removed quickly from the microcomponent.
  • the reproducibility of this separation step can be further increased if the lost Part is broken off along its predetermined breaking point on the lost part to release the micro-component from the semi-finished product.
  • the invention has also set itself the task of creating a semi-finished product with a lost part and a microcomponent that can be handled easily and safely by a manipulator despite the very small dimensions of the microcomponent.
  • a stable semi-finished product should be made possible.
  • the invention solves the problem with a semi-finished product with the features of main claim 9.
  • the lost part is designed as a macroscopic slide for the micro-component for handling the semi-finished product.
  • the lost part is designed as a macroscopic object carrier for the microcomponent
  • mechanical stresses can be borne by the object carrier, which is larger and/or more massive than the microcomponent.
  • the stability of the semi-finished product can thus be significantly increased.
  • the microcomponent can thus be freed from stresses caused by a manipulator because the slide can be used to handle the semifinished product, which can protect even a filigree microcomponent from damage and thus significantly improve the semifinished product according to the invention.
  • the lost part forms at least one handling surface on the outside of the semi-finished product, which is free from the microcomponent, even damage in the area of the handling surface cannot lead to any impairment of the microcomponent. Especially since the lost part is intended to be removed from the microcomponent and is therefore not part of the microcomponent. In addition, the handling of the semi-finished product can become easier and safer due to the larger handling area in relation to the micro-component.
  • the lost part can be removed by destroying the non-detachable form-fitting connection between the semi-finished product and the micro-component.
  • the lost part forms at least one positioning aid on the outside of the semi-finished product, which is free from the micro-component, this can further facilitate handling of the semi-finished product.
  • a positioning aid can be formed, for example, by a notch or recess on the lost part.
  • the lost part has an opening through which the microcomponent protrudes to form the connection, even slender microcomponents can be securely connected to the lost part or attached to the semi-finished product. Simplified handling conditions for the semi-finished product can result if the lost part is designed in the form of a plate.
  • the removal of the lost part can be further simplified if the lost part has a predetermined breaking point through which the positive connection between the microcomponent and the lost part can be destroyed. This destruction can end without damage to the microcomponent if the predetermined breaking point of the form-fitting connection, in particular the opening, approaches and in particular ends in front of it.
  • the semi-finished product can be particularly easy to handle if the lost part is designed in the form of a plate.
  • thermoplastic as the material for the lost part can meet the injection molding requirements and also ensure sufficient strength for holding micro-components with an elastomer base.
  • the lost part has at least one projection that forms an undercut, in particular a hidden one, on the microcomponent, even slender microcomponents can be held firmly on the lost part or attached to the macroscopic slide.
  • the semi-finished product 1 according to the invention is shown from a lost part 2 and from a micro-component 3.
  • the lost part 2 and the micro-component 3 have different materials - the lost part 2 consists of a thermoplastic and the micro-component 3 is made of silicone. Other materials are conceivable.
  • the lost part 2 and the microcomponent 3 are firmly connected to one another via a form-fitting connection 4 .
  • This compound 4 is particularly in 2 to recognize.
  • This connection 4 based on chemical interaction is preferably non-bonding.
  • connection 4 is created by using a known multi-component injection molding process, not shown in detail, by providing the lost part 2 in a mold cavity of an injection mold and then injecting a material on an elastomer basis, namely silicone, for example, in order to create the microcomponent 3 .
  • a material on an elastomer basis namely silicone, for example
  • the fixed and form-fitting connection 4 can be non-detachable or non-detachable, which is mentioned in general.
  • the lost part 2 In contrast to known semi-finished products with micro-components, the lost part 2 according to the invention not only serves to form contours on the micro-component 3, but also assumes the function of a macroscopic slide 5 for the micro-component 3.
  • a macroscopic slide 5 By choosing a macroscopic slide 5, automated handling of the Microcomponent 3 facilitated - in addition, its risk of damage is reduced due to manipulators not shown in detail.
  • the latter in particular also in that the lost part 2 forms a handling surface 7 for the manipulator that is free from the microcomponent 3 on the outside 6 of the semi-finished product 1 .
  • a manipulator can namely avoid contact surfaces on the micro-component 3 for handling the semi-finished product 1 - the carried micro-component 3 or the semi-finished product 1 can be supplied via the lost part 2 for manipulation tasks, positioning tasks and/or measuring tasks.
  • the manipulator keeps the microcomponent 3 unloaded when positioning it.
  • This handling surface 7 is, as in the Figures 1 to 3 As can be seen, the area on the outside 6 of the semi-finished product 1 is considerably larger than that of the microcomponent 3 in relation thereto.
  • a handling surface 7 can be produced in a simple manner in terms of process engineering by the lost part 2 correspondingly remaining free of the second material in the multi-component injection molding process. This can be done, for example, by shaping the mold space of the injection molding tool and/or also when the microcomponent 3 is ejected from the injection molding tool by tearing it off, by laser cutting or another separating method. In general, it is mentioned that this handling surface 7 can be formed on any side of the lost part 2, which remains free from the microcomponent 3 on the outside of the semi-finished product 1.
  • This handling surface 7 can be used, for example, by grippers, suction holders, etc., in order to manipulate the semi-finished product 1 for further steps.
  • the multi-component injection molding process according to the invention for producing this micro-component can also be understood as a multi-component micro-injection molding process.
  • injection molding of micro components or micro injection molding can be explained in principle on the basis of the processes involved in the production of macro components.
  • the main differences are in the weight of the components.
  • the weight of the microcomponents can be in the range of a few mg or preferably less than 10 mg, which can accordingly lead to dimensions starting in the ⁇ m range up to 0.1 ⁇ m.
  • the component weight and thus also the size of macro components is usually well above the ⁇ m range.
  • predetermined breaking point 8 The removal of the lost part 2 or the object carrier is considerably easier if the lost part 2 is one after 3 shown predetermined breaking point 8 has.
  • This predetermined breaking point 8 is also characterized in that it runs from the opposite end faces 15 of the lost part 2 or the semi-finished product 1 to an opening 9 in the lost part 2, which opening 9 with the protruding microcomponent 3 or its neck 10 for positive locking Connection 4 contributes. If the lost part 2 breaks along this predetermined breaking point 8, the positive connection 4 between the lost part 2 and the microcomponent 3 is destroyed and the microcomponent 3 is released without being damaged.
  • the predetermined breaking point 8 in the lost part 2 ends in a pointed manner in front of the opening in order to avoid a weakening of the strength of the semi-finished product 1 in the area of the enclosed neck 10 of the microcomponent 3, but nevertheless to create a secure breaking line. It is also conceivable that the microcomponent 3 is pressed out of the lost part 2 or the object carrier, which is entirely possible with such silicone components.
  • the semi-finished product 1 is flat and plate-shaped in a broader sense. Adjustable feet 11 are molded onto the semi-finished product 1 so that the semi-finished product 1 can be set down in relation to the microcomponent 3 without being damaged. Foot recesses 12 on the top of the semi-finished product make it easier to stack semi-finished products 1.
  • the reproducible handling of the semi-finished product 1 makes the micro-component 3 particularly suitable for use in electrical engineering, in that the semi-finished product is provided with a passive RFID transponder 13 . According to 2 this RFID transponder 13 is provided in a recess 14 of the microcomponent 3 . It is also conceivable to provide a medicinal substance 13 in this recess. All of this is reproducible because the handling surfaces 7 on the lost part 2 make it possible for a manipulator to position the microcomponent 3 exactly.
  • the microcomponent 3 can be held particularly securely by the lost part 2 on the one hand and by a hand tool on the other hand if a plurality of mounting recesses are provided on the microcomponent 3 .
  • a plurality of mounting recesses are provided on the microcomponent 3 .
  • One of these assembly recesses is made possible in a simple way on the microcomponent 3 in terms of process technology, in which a projection 16 forms a covered undercut 17 on the lost part 2 in the multi-component injection molding process - covered by the fact that only after a part has been removed (e.g. the after 2 shown right half of the lost part 2) this mounting recess is accessible and can thus be exposed.
  • This also makes it possible, after a partial removal of the lost part 2, to already hold and grip the microcomponent 3 before the lost part 2 is completely removed.
  • micro-component 3 The handling of the micro-component 3 is therefore user-friendly. Like in the 2 shown in dashed lines, it is also conceivable that two or more projections 16 are provided on the lost part 2 in order to improve the cohesion of the semi-finished product 1, for example.
  • two opposing groove-shaped recesses are provided on the top of the semi-finished product 1, namely on the lost part 2, which serve as a positioning aid 18.
  • the handling of the semi-finished product 1 can be made even easier as a result.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

Technisches Gebiettechnical field

Die Erfindung betrifft ein Halbzeug und ein Verfahren zur Herstellung eines mindestens ein Mikrobauteil aufweisenden Halbzeugs unter Verwendung eines Mehrkomponenten-Spritzgießverfahrens, bei dem wenigstens ein Formraum eines Spritzgießwerkzeugs mit mindestens einem verlorenen Teil aus einem ersten Werkstoff, insbesondere aus einem spritzgegossenen Kunststoffmaterial, versehen wird und in einem weiteren Schritt zur Erzeugung des Mikrobauteils ein zum ersten Werkstoff unterschiedlicher zweiter Werkstoff auf einer Elastomerbasis, insbesondere Silikonbasis, eingespritzt wird, wodurch sich zwischen Mikrobauteil und verlorenem Teil eine feste und formschlüssige Verbindung ausbildet.The invention relates to a semi-finished product and a method for producing a semi-finished product having at least one microcomponent using a multi-component injection molding process in which at least one mold cavity of an injection mold is provided with at least one lost part made of a first material, in particular an injection-molded plastic material, and in In a further step for producing the microcomponent, a second material, which is different from the first material and is based on an elastomer, in particular silicone, is injected, as a result of which a firm and form-fitting connection is formed between the microcomponent and the lost part.

Stand der TechnikState of the art

Zur Erzeugung von mehrkomponentigen Makrobauteilen, bestehend aus zwei unterschiedlichen Kunststoffen, ist es bekannt ( DE102011102571A1 ), ein Zweikomponenten-Spritzgießverfahren zu verwenden. Hiebei wird ein in einer Kavität eines Spritzgießwerkzeugs eingesetztes Teil mit einem anderen Werkstoff teilweise umspritzt. Dabei geht der andere Werkstoff mit dem eingesetzten Teil eine feste stoffschlüssige Verbindung ein, was zu einem Halbzeug führt, von dem über Sollbruchstellen fertige mehrkomponentige Makrobauteile abgebrochen werden können. Der umspritzte Teil dient sowohl als Teil der mehrkomponentigen Makrobauteile als auch als Objektträger für die Makrobauteile.For the production of multi-component macro components, consisting of two different plastics, it is known ( DE102011102571A1 ), to use a two-component injection molding process. Here, a part used in a cavity of an injection mold is partially overmoulded with another material. The other material forms a firm material connection with the part used, which leads to a semi-finished product from which finished multi-component macro components can be broken off via predetermined breaking points. The overmolded part serves both as part of the multi-component macro parts and as a slide for the macro parts.

Aus der WO98/39230A1 ist ein Verfahren zur Herstellung eines Magazins mit Mikrobauteilen bekannt.From the WO98/39230A1 a method for producing a magazine with micro-components is known.

Aus dem technischen Gebiet des Mikrospritzgusses, welcher zur Erzeugung von Kleinstbauteilen im Gewichtsbereich unterhalb von einem Milligramm verwendet wird, ist es bekannt ( DE19850046A1 ), Hohlstrukturen mithilfe eines Lösekerns bzw. verlorener Kern bzw. verlorenen Teils zu realisieren. Hierzu wird unter Verwendung eines Zweikomponenten-Spritzgießverfahrens der verlorene Teil umspritzt, wodurch sich zwischen diesen eine unlösbare, feste und formschlüssige Verbindung ausbildet. Anschließend wird der verlorene Teil aufgelöst, um diesen vom Halbzeug zu entfernen und so zum Mikrobauteil zu gelangen. Verschiedenste Werkstoffe für das Mikrobauteil und für den verlorenen Teil sind im Stand der Technik bekannt. Trotz der spritzgusstechnischen Schwierigkeiten in diesem technischen Gebiet des Mehrkomponenten-Mikrospritzgusses stellt zunehmend die Handhabung der damit erzeugten Mikrobauteile bekannte Manipulatoren, beispielsweise Roboter bzw. Greifer, vor Herausforderungen diese exakt zu greifen, zu halten, zu positionieren bzw. handhaben zu können. Mit einer meist zeitaufwendigen Feinpositionierung der Manipulatoren bzw. auch mit einer Fehlhandhabung solcher Mikrobauteile ist zu rechnen, was sowohl zu langen Zykluszeiten als auch Beschädigungen am Mikrobauteil führen kann.It is known from the technical field of micro-injection molding, which is used to produce extremely small components weighing less than a milligram ( DE19850046A1 ), to realize hollow structures using a loose core or lost core or lost part. For this purpose, the lost part is overmoulded using a two-component injection molding process, which creates an inseparable, firm and form-fitting connection between them. The lost part is then dissolved in order to remove it from the semi-finished product and thus get to the micro-component. A wide variety of materials for the microcomponent and for the lost part are known in the prior art. Despite the technical difficulties in injection molding in this technical field of multi-component micro-injection molding, the handling of the micro-components produced with it increasingly poses challenges for known manipulators, for example robots or grippers, in order to be able to grip, hold, position or handle them precisely. A mostly time-consuming fine positioning of the manipulators or incorrect handling of such microcomponents is to be expected, which can lead to both long cycle times and damage to the microcomponent.

Darstellung der ErfindungPresentation of the invention

Die Erfindung hat sich daher ausgehend vom eingangs geschilderten Stand der Technik die Aufgabe gestellt, ein Verfahren zur Herstellung eines Halbzeugs mit mindestens einem Mikrobauteil derart zu verändern, dass trotz kleinster Abmessungen am gespritzten Halbzeug risikofrei kurze Zykluszeiten erreicht werden können.Based on the prior art described at the outset, the invention has therefore set itself the task of changing a method for producing a semi-finished product with at least one micro-component in such a way that short cycle times can be achieved without risk despite the smallest dimensions on the injection-moulded semi-finished product.

Die Erfindung löst die gestellte Aufgabe durch die Bereitstellung eines Verfahrens mit den Merkmalen von Haupanspruch 1. Dabei wird das für den Formraum des Spritzgießwerkzeugs vorgesehene verlorene Teil als makroskopischer Objektträger für das Mikrobauteil zur Handhabung des Halbzeugs ausgebildet und der Formraum mit diesem verlorenen Teil versehen.The invention solves the problem by providing a method with the features of main claim 1. The lost part provided for the mold cavity of the injection mold is designed as a macroscopic slide for the microcomponent for handling the semi-finished product and the mold cavity is provided with this lost part.

Wird das für den Formraum des Spritzgießwerkzeugs vorgesehene verlorene Teil als makroskopischer Objektträger für das Mikrobauteil ausgebildet und der Formraum mit diesem verlorenen Teil versehen, kann in erster Linie die Handhabung des Mikrobauteils erleichtert werden, weil ein eventueller Manipulator nicht am Mikrobauteil, sondern am demgegenüber größeren und/oder schwereren Objektträger angreifen kann. Eine zeitaufwendige Feinpositionierung des Manipulators kann damit vermieden werden, was die Zykluszeit des erfindungsgemäßen Verfahrens deutlich vermindern kann. Zudem kann damit die Gefahr einer falschen Handhabung des Halbzeugs durch den Manipulator reduziert werden, was die Reproduzierbarkeit des erfindungsgemäßen Verfahrens weiter erhöhen kann. In weiterer Linie kann diese Handhabung des Halbzeugs über den verlorenen Teil nachteilige Handhabungseffekte vom Mikrobauteil fernhalten, zumal es in der Natur des verlorenen Teils liegt, vom Mikrobauteil vollständig getrennt zu werden. Kratzer bzw. andere Materialbeschädigungen am verlorenen Teil können somit die Reproduzierbarkeit des Verfahrens nicht beeinträchtigen, was der Wirtschaftlichkeit des Verfahrens zugutekommen kann. Das erfindungsgemäße Verfahren ist daher nicht nur schnell, sondern auch höchst reproduzierbar durchzuführen, was für eine Kostensenkung genützt werden kann. Vorzugsweise kann hierzu der verlorene Teil durch ein Spritzgießverfahren aus einem Kunststoffmaterial, insbesondere aus einem Thermoplast, hergestellt sein, um die geforderten makroskopischen Eigenschaften zum Objektträger zu erreichen.If the lost part intended for the mold cavity of the injection mold is designed as a macroscopic object carrier for the microcomponent and the mold cavity is provided with this lost part, the handling of the microcomponent can be made easier in the first place, because a possible manipulator does not work on the microcomponent but on the larger and larger part /or can attack heavier slides. A time-consuming fine positioning of the manipulator can thus be avoided, which can significantly reduce the cycle time of the method according to the invention. In addition, the risk of incorrect handling of the semi-finished product by the manipulator can be reduced, which can further increase the reproducibility of the method according to the invention. In a further line, this handling of the semi-finished product via the lost part can keep disadvantageous handling effects away from the microcomponent, especially since it is in the nature of the lost part to be completely separated from the microcomponent. Scratches or other material damage to the lost part can therefore not affect the reproducibility of the process, which can benefit the economics of the process. The method according to the invention can therefore not only be carried out quickly, but also in a highly reproducible manner, which can be used to reduce costs. For this purpose, the lost part can preferably be produced from a plastic material, in particular from a thermoplastic, by an injection molding process, in order to achieve the required macroscopic properties for the specimen slide.

Die Handhabung des Halbzeugs kann erleichtert werden, wenn am verlorenen Teil mindestens eine Handhabungsfläche an der Außenseite des Halbzeugs ausgebildet wird, die vom Mikrobauteil freigestellt ist. Dies kann zudem das sichere und schnelle Greifen des Halbzeugs vom Manipulator erhöhen und damit das Verfahren weiter erleichtern.The handling of the semi-finished product can be made easier if at least one handling surface is formed on the outside of the semi-finished product on the lost part, which surface is free from the micro-component. This can also increase the safe and quick gripping of the semi-finished product from the manipulator and thus further facilitate the process.

Die Reproduzierbarkeit des Verfahrens kann weiter erhöht werden, wenn zur Ausbildung der Verbindung zwischen Mikrobauteil und verlorenem Teil beim Mehrkomponenten-Spritzgießverfahren durch mindestens eine Öffnung am verlorenen Teil der zweite Werkstoff gespritzt wird. Über diese Öffnung im verlorenen Teil kann nämlich das Mikrobauteil an dessen Halsabschnitt zuverlässig gehalten werden, was selbst eine beschädigungsfreie Handhabung von vergleichsweise schlanken Mikrobauteilen sicherstellen kann.The reproducibility of the method can be further increased if, in order to form the connection between the microcomponent and the lost part in the multi-component injection molding method, through at least one opening on the lost part the second material is injected. This is because the microcomponent can be reliably held at its neck section via this opening in the lost part, which can ensure damage-free handling even of comparatively slender microcomponents.

Das Halbzeug kann für das Entfernen des verlorenen Teils dahin gehend vorbereitet werden, in dem im verlorenen Teil eine Sollbruchstelle ausgebildet wird. Vorzugsweise geschieht diese Ausbildung vor dem Einspritzen des zweiten Werkstoffs auf einer Elastomerbasis in den Formraum des Spritzgusswerkzeugs. Zudem kann damit das Zerteilen des verlorenen Teils und in weiterer Folge das Lösen der formschlüssigen Verbindung in vorbestimmten Bahnen verlaufen, um Beschädigungen am Mikrobauteil zu vermeiden.The semi-finished product can be prepared for the removal of the lost part in that a predetermined breaking point is formed in the lost part. This formation preferably takes place before the injection of the second material on an elastomer basis into the mold space of the injection molding tool. In addition, the dissection of the lost part and subsequently the release of the form-fitting connection can thus proceed in predetermined ways in order to avoid damage to the microcomponent.

Wird zudem diese Sollbruchstelle der formschlüssigen Verbindung zulaufend ausgebildet, kann beim Entfernen des verlorenen Teils die Gefahr einer Beschädigung am Mikrobauteil weiter vermindert werden. Vorzugsweise dann, wenn die Sollbruchstelle der Öffnung zulaufend ausgebildet wird. Zudem kann damit ein zuverlässiges Trennen der formschlüssigen Verbindung zwischen der Öffnung des verlorenen Teils und dem Mikrobauteil gewährleistet werden, wobei eine derart verlaufende Sollbruchstelle auch keine Beeinträchtigung der Handhabung des Halbzeugs erwarten lässt. Dies kann verbessert werden, wenn die Sollbruchstelle vor der Öffnung endet.If, in addition, this predetermined breaking point of the form-fitting connection is tapered, the risk of damage to the microcomponent can be further reduced when the lost part is removed. Preferably when the predetermined breaking point of the opening is tapered. In addition, a reliable separation of the form-fitting connection between the opening of the lost part and the microcomponent can thus be ensured, with a predetermined breaking point running in this way also not impairing the handling of the semi-finished product. This can be improved if the predetermined breaking point ends before the opening.

Kürzere Zykluszeiten im Verfahren können sich weiter ergeben, wenn der verlorene Teil durch ein Spritzgießverfahren aus einem Kunststoffmaterial hergestellt wird. Insbesondere kann hierbei auch eine Sollbruchstelle am verlorenen Teil hergestellt werden. Weitere Optimierungen können sich ergeben, wenn der verlorene Teil in einer Kavität des Spritzgießwerkzeugs für das Mehrkomponenten-Spritzgießverfahren erzeugt wird und über eine Indexplatte in den Formraum für das Mehrkomponenten-Spritzgießverfahren eingebracht, beispielsweise eingedreht, wird. Zu diesem Indexverfahren andere Verfahren sind denkbar, beispielsweise die Transfertechnik mit parallel zueinander angeordneten Maschinen.Shorter cycle times in the process can further result if the lost part is made from a plastic material by an injection molding process. In particular, a predetermined breaking point can also be produced on the lost part. Further optimizations can result if the lost part is produced in a cavity of the injection mold for the multi-component injection molding process and introduced into the mold space for the multi-component injection molding process via an index plate, for example screwed in, will. Other methods are conceivable for this index method, for example the transfer technique with machines arranged parallel to one another.

Die feste formschlüssige Verbindung zwischen verlorenem Teil und Mikrobauteil kann reproduzierbar ausgebildet werden, wenn beim Mehrkomponenten-Spritzgießverfahren das verlorene Teil mindestens einen Hinterschnitt am Mikrobauteil ausbildet. Dies kann weiter verbessert werden, wenn damit ein verdeckter Hinterschnitt am Mikrobauteil ausgebildet wird. Solche ein Hinterschnitt kann beispielsweise durch eine Auskragung am verlorenen Teil geschaffen werden. Außerdem stellt dieser Hinterschnitt kein Hindernis im Verfahren dar, auch dann nicht, wenn das verlorene Teil vom Mikrobauteil getrennt wird. Zumal in diesem Fall der Hinterschnitt dann am Mikrobauteil zugänglich ist und die Handhabung erleichtern kann. Diese so entstandene Montageausnehmung kann nämlich auf ein eventuelles Montagewerkzeuge abgestimmt werden.The fixed positive connection between the lost part and the microcomponent can be formed reproducibly if the lost part forms at least one undercut on the microcomponent in the multi-component injection molding process. This can be further improved if a hidden undercut is formed on the microcomponent. Such an undercut can be created, for example, by a projection on the lost part. In addition, this undercut does not represent an obstacle in the process, even if the lost part is separated from the micro-component. Especially since in this case the undercut is then accessible on the microcomponent and can facilitate handling. This mounting recess created in this way can namely be matched to a possible mounting tool.

Im Allgemeinen wird erwähnt, dass auf Grundlage der erleichterten Handhabbarkeit des Halbzeugs das Verfahren auch dazu verwendet werden kann, das Halbzeug mit einem medikamentösen Wirkstoff zu verbinden. Dies kann beispielsweise durch Besprühen, Rollbeschichtung oder dergleichen erfolgen. Damit kann auch sichergestellt werden, dass das Mikrobauteil diesen Wirkstoff trägt, auch wenn der verlorene Teil vom Mikrobauteil entfernt wird. Zudem ist vorstellbar, der Elastomerbasis des Mikrobauteils diesen Wirkstoff, zum Beispiel mit einer antibakteriellen Wirkung etc., beizumengen.In general, it is mentioned that, based on the easier handling of the semi-finished product, the method can also be used to connect the semi-finished product to a medicinal active substance. This can be done, for example, by spraying, roller coating or the like. This can also ensure that the microcomponent carries this active ingredient, even if the lost part is removed from the microcomponent. It is also conceivable to add this active ingredient, for example with an antibacterial effect, etc., to the elastomer base of the microcomponent.

Besonders auszeichnen kann sich das vorstehend beschriebene Verfahren, in dem dieses bei der Herstellung eines Mikrobauteils Anwendung findet. Dabei wird, um das Mikrobauteil vom Halbzeug freizugeben, der verlorene Teil vom Halbzeug entfernt. Insbesondere ein Trennen des verlorenen Teils vom Halbzeug kann ein schnelles Entfernen des verlorenen Teils vom Mikrobauteil ermöglichen. Die Reproduzierbarkeit dieses Trennschritts kann weiter erhöht werden, wenn der verlorene Teil entlang seiner Sollbruchstelle am verlorenen Teil abgebrochen wird, um das Mikrobauteil vom Halbzeug freizugeben.The method described above can be particularly distinguished in that it is used in the production of a microcomponent. The lost part is removed from the semi-finished product in order to release the micro-component from the semi-finished product. In particular, separating the lost part from the semi-finished product can enable the lost part to be removed quickly from the microcomponent. The reproducibility of this separation step can be further increased if the lost Part is broken off along its predetermined breaking point on the lost part to release the micro-component from the semi-finished product.

Die Erfindung hat sich zudem ausgehend vom eingangs geschilderten Stand der Technik die Aufgabe gestellt, ein Halbzeug mit einem verlorenen Teil und einem Mikrobauteil zu schaffen, das trotz kleinster Abmessungen am Mikrobauteil von einem Manipulator einfach und sicher gehandhabt werden kann. Zudem soll ein standfestes Halbzeug ermöglicht werden.Based on the prior art described above, the invention has also set itself the task of creating a semi-finished product with a lost part and a microcomponent that can be handled easily and safely by a manipulator despite the very small dimensions of the microcomponent. In addition, a stable semi-finished product should be made possible.

Die Erfindung löst die gestellte Aufgabe mit einem Halbzeug mit den Merkmalen von Haupanspruch 9. Hierbei ist das verlorene Teil als makroskopischer Objektträger für das Mikrobauteil zur Handhabung des Halbzeugs ausgebildet.The invention solves the problem with a semi-finished product with the features of main claim 9. Here, the lost part is designed as a macroscopic slide for the micro-component for handling the semi-finished product.

Ist das verlorene Teil als makroskopischer Objektträger für das Mikrobauteil ausgebildet, können mechanische Belastungen vom gegenüber dem Mikrobauteil größeren und/oder massereicheren Objektträger abgetragen werden. Die Standfestigkeit des Halbzeugs kann damit erheblich erhöht werden. Außerdem kann damit das Mikrobauteil von Belastungen durch einen Manipulator freigestellt werden, weil der Objektträger zur Handhabung des Halbzeugs dienen kann, was selbst ein filigranes Mikrobauteil gegenüber Beschädigungen schützen und damit das erfindungsgemäße Halbzeug erheblich verbessern kann.If the lost part is designed as a macroscopic object carrier for the microcomponent, mechanical stresses can be borne by the object carrier, which is larger and/or more massive than the microcomponent. The stability of the semi-finished product can thus be significantly increased. In addition, the microcomponent can thus be freed from stresses caused by a manipulator because the slide can be used to handle the semifinished product, which can protect even a filigree microcomponent from damage and thus significantly improve the semifinished product according to the invention.

Bildet das verlorene Teil mindestens eine Handhabungsfläche an der Außenseite des Halbzeugs aus, die vom Mikrobauteil freigestellt ist, können selbst Beschädigungen im Bereich der Handhabungsfläche zu keiner Beeinträchtigung des Mikrobauteils führen. Zumal das verlorene Teil zum Entfernen vom Mikrobauteil vorgesehen ist und damit keinen Bestandteil des Mikrobauteils darstellt. Hinzu kommt, dass die Handhabung des Halbzeugs durch die in Relation zum Mikrobauteil flächengrößere Handhabungsfläche einfacher und sicher werden kann.If the lost part forms at least one handling surface on the outside of the semi-finished product, which is free from the microcomponent, even damage in the area of the handling surface cannot lead to any impairment of the microcomponent. Especially since the lost part is intended to be removed from the microcomponent and is therefore not part of the microcomponent. In addition, the handling of the semi-finished product can become easier and safer due to the larger handling area in relation to the micro-component.

Im Allgemeinen wird erwähnt, dass das Entfernen des verlorenen Teils durch Zerstören der unlösbaren formschlüssigen Verbindung zwischen Halbzeug und Mikrobauteil erfolgen kann.In general, it is mentioned that the lost part can be removed by destroying the non-detachable form-fitting connection between the semi-finished product and the micro-component.

Bildet das verlorene Teil mindestens eine Positionierhilfe an der Außenseite des Halbzeugs aus, die vom Mikrobauteil freigestellt ist, kann diese die Handhabung des Halbzeugs weiter erleichtern. Solch eine Positionierhilfe kann beispielsweise von einer Kerbe oder Ausnehmung am verlorenen Teil gebildet werden.If the lost part forms at least one positioning aid on the outside of the semi-finished product, which is free from the micro-component, this can further facilitate handling of the semi-finished product. Such a positioning aid can be formed, for example, by a notch or recess on the lost part.

Weist das verlorene Teil eine Öffnung auf, durch die das Mikrobauteil zur Ausbildung der Verbindung ragt, können selbst schlanke Mikrobauteile standfest mit dem verlorenen Teil verbunden bzw. am Halbzeug befestigt werden. Vereinfachte Handhabungsverhältnisse zum Halbzeug können sich ergeben, wenn der verlorene Teil plattenförmig ausgebildet ist.If the lost part has an opening through which the microcomponent protrudes to form the connection, even slender microcomponents can be securely connected to the lost part or attached to the semi-finished product. Simplified handling conditions for the semi-finished product can result if the lost part is designed in the form of a plate.

Das Entfernen des verlorenen Teils kann weiter vereinfacht werden, wenn der verlorene Teil eine Sollbruchstelle aufweist, über die die formschlüssige Verbindung zwischen Mikrobauteil und verlorenem Teil zerstört werden kann. Dieses Zerstören kann beschädigungsfrei für das Mikrobauteil enden, wenn die Sollbruchstelle der formschlüssigen Verbindung, insbesondere der Öffnung, zuläuft und insbesondere davor endet.The removal of the lost part can be further simplified if the lost part has a predetermined breaking point through which the positive connection between the microcomponent and the lost part can be destroyed. This destruction can end without damage to the microcomponent if the predetermined breaking point of the form-fitting connection, in particular the opening, approaches and in particular ends in front of it.

Besonders handhabungsfreundlich kann das Halbzeug dadurch werden, in dem der verlorene Teil plattenförmig ausgebildet ist. Vorzugsweise kann Thermoplast als Werkstoff für den verlorenen Teil den spritzgusstechnischen Anforderungen genügen und auch eine ausreichende Festigkeit zum Halten von Mikrobauteilen mit einer Elastomerbasis gewährleisten.The semi-finished product can be particularly easy to handle if the lost part is designed in the form of a plate. Preferably, thermoplastic as the material for the lost part can meet the injection molding requirements and also ensure sufficient strength for holding micro-components with an elastomer base.

Weist das verlorene Teil mindestens eine Auskragung auf, die einen, insbesondere verdeckten, Hinterschnitt am Mikrobauteil ausbildet, können selbst schlanke Mikrobauteile standfest am verlorenen Teil gehalten werden bzw. am makroskopischen Objektträger befestigt werden.If the lost part has at least one projection that forms an undercut, in particular a hidden one, on the microcomponent, even slender microcomponents can be held firmly on the lost part or attached to the macroscopic slide.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

In den Figuren ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen

Fig. 1
eine Draufsicht auf ein Halbzeug mit einem Mikrobauteil,
Fig. 2
eine Schnittansicht nach II-II der Fig. 1 und
Fig. 3
eine Unteransicht der Fig. 1.
In the figures, the subject of the invention is shown by way of example. Show it
1
a plan view of a semi-finished product with a micro-component,
2
a sectional view according to II-II of 1 and
3
a bottom view of 1 .

Wege zur Ausführung der ErfindungWays to carry out the invention

Gemäß den Figuren 1 bis 3 wird beispielsweise das erfindungsgemäße Halbzeug 1 aus einem verlorenen Teil 2 und aus einem Mikrobauteil 3 gezeigt. Der verlorene Teil 2 und das Mikrobauteil 3 weisen unterschiedliche Werkstoffe auf - so besteht das verlorene Teil 2 aus einem Thermoplast und das Mikrobauteil 3 aus Silikon. Andere Werkstoffe sind vorstellbar. Der verlorene Teil 2 und das Mikrobauteil 3 sind über eine formschlüssige Verbindung 4 miteinander fest verbunden. Diese Verbindung 4 ist insbesondere in Fig. 2 zu erkennen. Vorzugsweise ist diese Verbindung 4 auf chemischer Wechselwirkung beruhend stoffschlussfrei. Die Verbindung 4 wird durch Verwendung eines bekannten, nicht näher dargestellten Mehrkomponenten-Spritzgießverfahrens geschaffen, indem in einem Formraum eines Spritzgießwerkzeugs das verlorene Teil 2 vorgesehen und anschließend ein Werkstoff auf einer Elastomerbasis, nämlich beispielsweise Silikon, eingespritzt wird, um damit das Mikrobauteil 3 zu schaffen. Durch Entfernen, beispielsweise Zerstören, des verlorenen Teils 2 kann diese feste formschlüssige Verbindung 4 aufgehoben und damit das Mikrobauteil 3 vom Halbzeug 1 getrennt werden. Die feste und formschlüssige Verbindung 4 kann unlösbar bzw. kann nicht lösbar sein, was im Allgemeinen erwähnt wird.According to the Figures 1 to 3 For example, the semi-finished product 1 according to the invention is shown from a lost part 2 and from a micro-component 3. The lost part 2 and the micro-component 3 have different materials - the lost part 2 consists of a thermoplastic and the micro-component 3 is made of silicone. Other materials are conceivable. The lost part 2 and the microcomponent 3 are firmly connected to one another via a form-fitting connection 4 . This compound 4 is particularly in 2 to recognize. This connection 4 based on chemical interaction is preferably non-bonding. The connection 4 is created by using a known multi-component injection molding process, not shown in detail, by providing the lost part 2 in a mold cavity of an injection mold and then injecting a material on an elastomer basis, namely silicone, for example, in order to create the microcomponent 3 . By removing, for example destroying, the lost part 2, this fixed form-fitting connection 4 can be canceled and the microcomponent 3 can thus be separated from the semi-finished product 1. The fixed and form-fitting connection 4 can be non-detachable or non-detachable, which is mentioned in general.

Im Gegensatz zu bekannten Halbzeugen mit Mikrobauteilen dient das erfindungsgemäße verlorene Teil 2 nicht nur zur Ausbildung von Konturen am Mikrobauteil 3, sondern übernimmt auch die Funktion eines makroskopischen Objektträgers 5 für das Mikrobauteil 3. Durch die Wahl eines makroskopischen Objektträgers 5 ist auch eine automatisierte Handhabung des Mikrobauteils 3 erleichtert - zudem geht insbesondere auch dessen Beschädigungsgefahr aufgrund nicht näher dargestellter Manipulatoren zurück. Letzteres im Speziellen auch dadurch, dass der verlorene Teil 2 eine vom Mikrobauteil 3 freigestellte Handhabungsfläche 7 für den Manipulator an der Außenseite 6 des Halbzeugs 1 ausbildet. Ein Manipulator kann nämlich zur Handhabung des Halbzeugs 1 Berührungsflächen am Mikrobauteil 3 vermeiden - über das verlorene Teil 2 kann das getragene Mikrobauteil 3 bzw. das Halbzeug 1 Manipulieraufgaben, Positionieraufgaben und/oder Messaufgaben zugeführt werden. Unter anderem hält der Manipulator beim Positionieren des Mikrobauteils 3 dieses belastungsfrei.In contrast to known semi-finished products with micro-components, the lost part 2 according to the invention not only serves to form contours on the micro-component 3, but also assumes the function of a macroscopic slide 5 for the micro-component 3. By choosing a macroscopic slide 5, automated handling of the Microcomponent 3 facilitated - in addition, its risk of damage is reduced due to manipulators not shown in detail. The latter in particular also in that the lost part 2 forms a handling surface 7 for the manipulator that is free from the microcomponent 3 on the outside 6 of the semi-finished product 1 . A manipulator can namely avoid contact surfaces on the micro-component 3 for handling the semi-finished product 1 - the carried micro-component 3 or the semi-finished product 1 can be supplied via the lost part 2 for manipulation tasks, positioning tasks and/or measuring tasks. Among other things, the manipulator keeps the microcomponent 3 unloaded when positioning it.

Diese Handhabungsfläche 7 ist, wie in den Figuren 1 bis 3 zu erkennen, an der Außenseite 6 des Halbzeugs 1 in der Fläche erheblich größer als dies in Relation dazu das Mikrobauteil 3 ist. Solch eine Handhabungsfläche 7 kann auf verfahrenstechnisch einfache Weise dadurch hergestellt werden, indem beim Mehrkomponenten-Spritzgießverfahren das verlorene Teil 2 vom zweiten Werkstoff dementsprechend freigestellt bleibt. Dies kann beispielsweise durch die Formgebung des Formraums des Spritzgusswerkzeugs und/oder auch beim Auswerfen des Mikrobauteils 3 aus dem Spritzgusswerkzeug durch Abriss, durch Laserschneiden oder einem anderen Trennverfahren erfolgen. Im Allgemeinen wird erwähnt, dass sich diese Handhabungsfläche 7 an beliebigen Seiten des verlorenen Teils 2 ausbilden kann, die vom Mikrobauteil 3 außen am Halbzeug 1 freigestellt bleibt. Diese Handhabungsfläche 7 kann beispielsweise von Greifern, Saughalter etc. genützt werden, um das Halbzeug 1 für weitere Schritte zu manipulieren.This handling surface 7 is, as in the Figures 1 to 3 As can be seen, the area on the outside 6 of the semi-finished product 1 is considerably larger than that of the microcomponent 3 in relation thereto. Such a handling surface 7 can be produced in a simple manner in terms of process engineering by the lost part 2 correspondingly remaining free of the second material in the multi-component injection molding process. This can be done, for example, by shaping the mold space of the injection molding tool and/or also when the microcomponent 3 is ejected from the injection molding tool by tearing it off, by laser cutting or another separating method. In general, it is mentioned that this handling surface 7 can be formed on any side of the lost part 2, which remains free from the microcomponent 3 on the outside of the semi-finished product 1. This handling surface 7 can be used, for example, by grippers, suction holders, etc., in order to manipulate the semi-finished product 1 for further steps.

Das erfindungsgemäße Mehrkomponenten-Spritzgießverfahrens zur Herstellung dieses Mikrobauteils kann auch als Mehrkomponenten-Mikrospritzgießverfahren verstanden werden.
Hierzu wird im Allgemeinen festgehalten, dass ein Spritzgießen von Mikrobauteilen bzw. Mikrospritzgießen sich prinzipiell anhand der Vorgänge bei der Herstellung von Makrobauteilen erklären lässt. Die Unterschiede liegen vor allem im Gewicht der Bauteile. So wird im Allgemeinen erwähnt, dass sich das Gewicht der Mikrobauteile im Bereich weniger mg bzw. vorzugsweise unter 10 mg bewegen kann, was dementsprechend zu Dimensionen beginnend im µm-Bereich bis hin zu 0,1 µm führen kann. Im Gegensatz dazu liegt das Bauteilgewicht und damit auch die Größe von Makrobauteilen meist deutlich über dem µm-Bereich.The multi-component injection molding process according to the invention for producing this micro-component can also be understood as a multi-component micro-injection molding process.
In this regard, it is generally stated that injection molding of micro components or micro injection molding can be explained in principle on the basis of the processes involved in the production of macro components. The main differences are in the weight of the components. In general, it is mentioned that the weight of the microcomponents can be in the range of a few mg or preferably less than 10 mg, which can accordingly lead to dimensions starting in the μm range up to 0.1 μm. In contrast, the component weight and thus also the size of macro components is usually well above the µm range.

Das Entfernen des verlorenen Teils 2 bzw. des Objektträgers ist erheblich einfacher, wenn der verlorene Teil 2 eine nach Fig. 3 dargestellte Sollbruchstelle 8 aufweist. Diese Sollbruchstelle 8 zeichnet sich zudem dadurch aus, dass sie von den gegenüberliegenden Stirnseiten 15 des verlorenen Teils 2 bzw. des Halbzeugs 1 auf eine Öffnung 9 im verlorenen Teil 2 zuläuft, welche Öffnung 9 mit dem durchragenden Mikrobauteil 3 bzw. dessen Hals 10 zur formschlüssigen Verbindung 4 beiträgt. Bricht das verlorene Teil 2 entlang dieser Sollbruchstelle 8, wird damit die formschlüssige Verbindung 4 zwischen verlorenem Teil 2 und Mikrobauteil 3 zerstört und das Mikrobauteil 3 beschädigungsfrei freigegeben. Wie zudem der Fig. 3 zu entnehmen ist, endet die Sollbruchstelle 8 im verlorenen Teil 2 vor der Öffnung spitz zulaufend, um im Bereich des umschlossenen Halses 10 des Mikrobauteils 3 eine Schwächung der Festigkeit des Halbzeugs 1 zu vermeiden, dennoch aber eine sichere Bruchlinie zu schaffen. Es ist außerdem vorstellbar, dass das Mikrobauteil 3 aus dem verlorenen Teil 2 bzw. dem Objektträger herausgedrückt wird, was bei solchen Silikonbauteilen durchaus möglich ist.The removal of the lost part 2 or the object carrier is considerably easier if the lost part 2 is one after 3 shown predetermined breaking point 8 has. This predetermined breaking point 8 is also characterized in that it runs from the opposite end faces 15 of the lost part 2 or the semi-finished product 1 to an opening 9 in the lost part 2, which opening 9 with the protruding microcomponent 3 or its neck 10 for positive locking Connection 4 contributes. If the lost part 2 breaks along this predetermined breaking point 8, the positive connection 4 between the lost part 2 and the microcomponent 3 is destroyed and the microcomponent 3 is released without being damaged. As well as the 3 as can be seen, the predetermined breaking point 8 in the lost part 2 ends in a pointed manner in front of the opening in order to avoid a weakening of the strength of the semi-finished product 1 in the area of the enclosed neck 10 of the microcomponent 3, but nevertheless to create a secure breaking line. It is also conceivable that the microcomponent 3 is pressed out of the lost part 2 or the object carrier, which is entirely possible with such silicone components.

Wie der Fig. 2 zu entnehmen, ist das Halbzeug 1 flach und im weiteren Sinne plattenförmig ausgeführt. Am Halbzeug 1 sind Stellfüße 11 angespritzt, um das Halbzeug 1 beschädigungsfrei in Bezug auf das Mikrobauteil 3 abstellen zu können. Fußausnehmungen 12 an der Oberseite des Halbzeugs erleichtern die Stapelbarkeit von Halbzeugen 1.Once again 2 can be seen, the semi-finished product 1 is flat and plate-shaped in a broader sense. Adjustable feet 11 are molded onto the semi-finished product 1 so that the semi-finished product 1 can be set down in relation to the microcomponent 3 without being damaged. Foot recesses 12 on the top of the semi-finished product make it easier to stack semi-finished products 1.

Durch die reproduzierbare Handhabung des Halbzeugs 1 eignet sich das Mikrobauteil 3 besonders zur Anwendung in der Elektrotechnik, indem das Halbzeug mit einem passiven RFID-Transponder 13 versehen wird. Gemäß Fig. 2 ist dieser RFID-Transponder 13 in einer Ausnehmung 14 des Mikrobauteils 3 vorgesehen. Denkbar ist auch, einen medikamentösen Wirkstoff 13 in dieser Ausnehmung vorzusehen. All das wird reproduzierbar möglich, in dem die Handhabungsflächen 7 am verlorenen Teil 2 eine exakte Positionierung des Mikrobauteils 3 von einem Manipulator möglich machen.The reproducible handling of the semi-finished product 1 makes the micro-component 3 particularly suitable for use in electrical engineering, in that the semi-finished product is provided with a passive RFID transponder 13 . According to 2 this RFID transponder 13 is provided in a recess 14 of the microcomponent 3 . It is also conceivable to provide a medicinal substance 13 in this recess. All of this is reproducible because the handling surfaces 7 on the lost part 2 make it possible for a manipulator to position the microcomponent 3 exactly.

Zudem kann das Mikrobauteil 3 einerseits vom verlorenen Teil 2 besonders sicher und andererseits von einem Handwerkzeug standfest gehalten werden, wenn am Mikrobauteil 3 mehrere Montageausnehmungen vorgesehen sind. Einer dieser Montageausnehmungen wird verfahrenstechnisch einfach am Mikrobauteil 3 ermöglicht, in dem beim Mehrkomponenten-Spritzgießverfahren eine Auskragung 16 am verlorenen Teil 2 einen verdeckten Hinterschnitt 17 ausformt - verdeckt dadurch, dass erst nach einem Entfernen eines Teils (beispielsweise die nach Fig. 2 dargestellte rechte Hälfte des verlorenen Teils 2) diese Montageausnehmung zugänglich wird bzw. damit freigelegt werden kann. Damit wird es auch möglich, nach einem Teilentfernen des verloren Teils 2, das Mikrobauteil 3 bereits zu halten und zu greifen, bevor das verlorene Teil 2 vollständig entfernt wird. Die Handhabung des Mikrobauteils 3 ist daher benutzerfreundlich. Wie in der Fig. 2 strichliert dargestellt, ist es zudem vorstellbar, dass am verlorenen Teil 2 zwei oder mehrere Auskragungen 16 vorgesehen sind, um damit beispielsweise den Zusammenhalt des Halbzeugs 1 zu verbessern.In addition, the microcomponent 3 can be held particularly securely by the lost part 2 on the one hand and by a hand tool on the other hand if a plurality of mounting recesses are provided on the microcomponent 3 . One of these assembly recesses is made possible in a simple way on the microcomponent 3 in terms of process technology, in which a projection 16 forms a covered undercut 17 on the lost part 2 in the multi-component injection molding process - covered by the fact that only after a part has been removed (e.g. the after 2 shown right half of the lost part 2) this mounting recess is accessible and can thus be exposed. This also makes it possible, after a partial removal of the lost part 2, to already hold and grip the microcomponent 3 before the lost part 2 is completely removed. The handling of the micro-component 3 is therefore user-friendly. Like in the 2 shown in dashed lines, it is also conceivable that two or more projections 16 are provided on the lost part 2 in order to improve the cohesion of the semi-finished product 1, for example.

Wie insbesondere der Fig. 1 weiter zu entnehmen, sind auf der Oberseite des Halbzeugs 1, nämlich am verlorenen Teil 2 zwei gegenüberliegende nutenförmige Ausnehmungen vorgesehen, die als Positionierhilfe 18 dienen. Damit kann das Halbzeug 1 über in diese Positionierhilfe 18 eingreifbare nicht näher dargestellte Zentriernasen auf einfache Weise für den Manipulator ausgerichtet werden. Die Handhabung des Halbzeugs 1 kann sich dadurch noch weiter erleichtern.Like that one in particular 1 to see further, two opposing groove-shaped recesses are provided on the top of the semi-finished product 1, namely on the lost part 2, which serve as a positioning aid 18. This allows the semi-finished product 1 can be aligned in a simple manner for the manipulator by means of centering lugs (not shown) which can be engaged in this positioning aid 18 . The handling of the semi-finished product 1 can be made even easier as a result.

Im Allgemeinen wird weiter erwähnt, dass eine Elastomerbasis auf Basis von NBR (Nitrilkautschuk), HNBR (Hydrierter Nitrilkautschuk), FPM (Fluorelastomer), EPDM (Ethylen-Propylen Kautschuk mit dritter Komponente), ECO (Epichlorhydrin-Kautschuk), TPE (Thermoplastische Elastomere) mit oder ohne Trennmittel, HTV-Silikon (High temperature vulcanised Silikonkautschuk) oder auch Silikon im Allgemeinen aufgebaut sein kann.In general, it is further mentioned that an elastomer base based on NBR (nitrile rubber), HNBR (hydrogenated nitrile rubber), FPM (fluoroelastomer), EPDM (ethylene-propylene rubber with a third component), ECO (epichlorohydrin rubber), TPE (thermoplastic elastomers ) with or without a release agent, HTV silicone (high temperature vulcanised silicone rubber) or silicone in general.

Claims (15)

  1. A method for manufacturing a semi-finished product (1) having at least one micro-component (3) using a multi-component injection molding process in which at least one mold chamber of an injection mold is provided with at least one lost part (2) made of a first material, more particularly an injection-molded plastic material, and in another step for producing the micro-component (3), a second material, which is different from the first material and is elastomer-based, more particularly silicone-based, is injected, as a result of which a firm and form-fitting connection (4) forms between the micro-component (3) and the lost part (2), characterized in that the lost part (2) is embodied as a macroscopic object holder (5) for the micro-component (3) for manipulating the semi-finished product (1) and the mold chamber is provided with this lost part (2).
  2. The method according to claim 1, characterized in that on the lost part (2), at least one manipulating surface (7) is embodied on the outside (6) of the semi-finished product (1), which is left accessible by the micro-component (3).
  3. The method according to claim 1 or 2, characterized in that to form the connection (5) between the micro-component (3) and the lost part (2) during the multi-component injection molding process, the second material is injected through at least one opening (9) in the lost part (2).
  4. The method according to claim 1, 2, or 3, characterized in that a predetermined breaking point (8) is embodied in the lost part (2).
  5. The method according to claim 4, characterized in that the predetermined breaking point (8) of the form-fitting connection (4), more particularly opening (9), is embodied as tapering and as ending before it.
  6. The method according to one of claims 1 to 5, characterized in that during the multi-component injection molding process, the lost part (2) forms at least one undercut (17), more particularly a hidden one, on the micro-component (3).
  7. A manufacturing method for a micro-component (3), in which a semi-finished product (1) according to one of claims 1 to 6 is manufactured and the lost part (2) is removed from the semi-finished product (1).
  8. The manufacturing method according to claim 7, characterized in that the lost part (2) is separated from the semi-finished product (1), more particularly is broken off by means of its predetermined breaking point (8).
  9. A semi-finished product having a lost part (2), having at least one micro-component (3) made of a material that is different from the material of the lost part (2), which is elastomer-based, more particularly silicone-based, and having a firm and form-fitting connection (4), which is provided between the micro-component (3) and the lost part (2), characterized in that the lost part (2) is embodied as a macroscopic object holder (5) for the micro-component (3) for manipulating the semi-finished product (1).
  10. The semi-finished product according to claim 9, characterized in that the lost part (2) forms at least one manipulating surface (7) on the outside (6) of the semi-finished product (1), which is left accessible by the micro-component (3).
  11. The semi-finished product according to claim 9 or 10, characterized in that the lost part (2) forms at least one positioning aid (18) on the outside (6) of the semi-finished product (1), which is left accessible by the micro-component (3).
  12. The semi-finished product according to claim 9, 10, or 11, characterized in that the lost part (2) has an opening (9) through which the micro-component (3) protrudes to form the connection (4).
  13. The semi-finished product according to one of claims 9 to 12, characterized in that the lost part (2) has a predetermined breaking point (8) for destroying the connection between the micro-component (3) and the lost part (2) and more particularly, the predetermined breaking point (8) of the form-fitting connection (4) tapers, preferably the opening (9) tapers and ends before it.
  14. The semi-finished product according to one of claims 9 to 13, characterized in that the lost part (2), which is more particularly comprised of a thermoplastic, is embodied as plate-shaped.
  15. The semi-finished product according to one of claims 9 to 14, characterized in that the lost part (2) has at least one overhang (16) that forms an undercut (17), more particularly a hidden one, on the micro-component (3).
EP18718131.8A 2017-04-11 2018-04-11 Semi-finished product and method for manufacturing a semi-finished product having at least one microcomponent Active EP3609667B1 (en)

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EP17166126.7A EP3388217A1 (en) 2017-04-11 2017-04-11 Semi-finished product and method for manufacturing a semi-finished product having at least one microcomponent
PCT/EP2018/059339 WO2018189270A1 (en) 2017-04-11 2018-04-11 Semi-finished product and method for producing a semi-finished product comprising at least one microcomponent

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DE19709136A1 (en) * 1997-03-06 1998-09-10 Inst Mikrotechnik Mainz Gmbh Process for the production and storage of micro components, magazine and assembly process for micro components
DE19850046A1 (en) 1998-10-30 2000-05-11 Ver Foerderung Inst Kunststoff Injection molding process and equipment for molding microscopic plastic components with hollow chambers, undercuts or channel uses soluble plastic insert
DE19926181C1 (en) * 1999-06-09 2000-12-14 Inst Mikrotechnik Mainz Gmbh Magazine for microstructured molded parts and process for its production
DE10003999A1 (en) * 2000-01-29 2001-08-16 Inst Mikrotechnik Mainz Gmbh Magazine for holding microcomponents has a stabilizing grid to ensure their correct location after magazine manufacture
DE102011102571A1 (en) 2011-05-26 2012-11-29 Interbros Gmbh Interdental cleaner set and sales unit for this
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EP3388217A1 (en) 2018-10-17
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PL3609667T3 (en) 2022-09-26

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